Commit | Line | Data |
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1da177e4 | 1 | /* |
7b718769 NS |
2 | * Copyright (c) 2000-2002,2005 Silicon Graphics, Inc. |
3 | * All Rights Reserved. | |
1da177e4 | 4 | * |
7b718769 NS |
5 | * This program is free software; you can redistribute it and/or |
6 | * modify it under the terms of the GNU General Public License as | |
1da177e4 LT |
7 | * published by the Free Software Foundation. |
8 | * | |
7b718769 NS |
9 | * This program is distributed in the hope that it would be useful, |
10 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
11 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
12 | * GNU General Public License for more details. | |
1da177e4 | 13 | * |
7b718769 NS |
14 | * You should have received a copy of the GNU General Public License |
15 | * along with this program; if not, write the Free Software Foundation, | |
16 | * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA | |
1da177e4 | 17 | */ |
1da177e4 | 18 | #include "xfs.h" |
a844f451 | 19 | #include "xfs_fs.h" |
1da177e4 | 20 | #include "xfs_types.h" |
a844f451 | 21 | #include "xfs_bit.h" |
1da177e4 | 22 | #include "xfs_log.h" |
a844f451 | 23 | #include "xfs_inum.h" |
1da177e4 LT |
24 | #include "xfs_trans.h" |
25 | #include "xfs_sb.h" | |
a844f451 | 26 | #include "xfs_ag.h" |
1da177e4 LT |
27 | #include "xfs_dir2.h" |
28 | #include "xfs_dmapi.h" | |
29 | #include "xfs_mount.h" | |
1da177e4 | 30 | #include "xfs_bmap_btree.h" |
a844f451 | 31 | #include "xfs_alloc_btree.h" |
1da177e4 | 32 | #include "xfs_ialloc_btree.h" |
1da177e4 | 33 | #include "xfs_dir2_sf.h" |
a844f451 | 34 | #include "xfs_attr_sf.h" |
1da177e4 LT |
35 | #include "xfs_dinode.h" |
36 | #include "xfs_inode.h" | |
37 | #include "xfs_ialloc.h" | |
38 | #include "xfs_itable.h" | |
39 | #include "xfs_error.h" | |
a844f451 | 40 | #include "xfs_btree.h" |
1da177e4 | 41 | |
6f1f2168 VA |
42 | int |
43 | xfs_internal_inum( | |
44 | xfs_mount_t *mp, | |
45 | xfs_ino_t ino) | |
46 | { | |
47 | return (ino == mp->m_sb.sb_rbmino || ino == mp->m_sb.sb_rsumino || | |
62118709 | 48 | (xfs_sb_version_hasquota(&mp->m_sb) && |
6f1f2168 VA |
49 | (ino == mp->m_sb.sb_uquotino || ino == mp->m_sb.sb_gquotino))); |
50 | } | |
51 | ||
1da177e4 LT |
52 | STATIC int |
53 | xfs_bulkstat_one_iget( | |
54 | xfs_mount_t *mp, /* mount point for filesystem */ | |
55 | xfs_ino_t ino, /* inode number to get data for */ | |
56 | xfs_daddr_t bno, /* starting bno of inode cluster */ | |
57 | xfs_bstat_t *buf, /* return buffer */ | |
58 | int *stat) /* BULKSTAT_RV_... */ | |
59 | { | |
347d1c01 | 60 | xfs_icdinode_t *dic; /* dinode core info pointer */ |
1da177e4 LT |
61 | xfs_inode_t *ip; /* incore inode pointer */ |
62 | int error; | |
63 | ||
745b1f47 NS |
64 | error = xfs_iget(mp, NULL, ino, |
65 | XFS_IGET_BULKSTAT, XFS_ILOCK_SHARED, &ip, bno); | |
1da177e4 LT |
66 | if (error) { |
67 | *stat = BULKSTAT_RV_NOTHING; | |
68 | return error; | |
69 | } | |
70 | ||
71 | ASSERT(ip != NULL); | |
92bfc6e7 | 72 | ASSERT(ip->i_imap.im_blkno != 0); |
1da177e4 LT |
73 | |
74 | dic = &ip->i_d; | |
75 | ||
76 | /* xfs_iget returns the following without needing | |
77 | * further change. | |
78 | */ | |
79 | buf->bs_nlink = dic->di_nlink; | |
80 | buf->bs_projid = dic->di_projid; | |
81 | buf->bs_ino = ino; | |
82 | buf->bs_mode = dic->di_mode; | |
83 | buf->bs_uid = dic->di_uid; | |
84 | buf->bs_gid = dic->di_gid; | |
85 | buf->bs_size = dic->di_size; | |
df80c933 | 86 | vn_atime_to_bstime(VFS_I(ip), &buf->bs_atime); |
1da177e4 LT |
87 | buf->bs_mtime.tv_sec = dic->di_mtime.t_sec; |
88 | buf->bs_mtime.tv_nsec = dic->di_mtime.t_nsec; | |
89 | buf->bs_ctime.tv_sec = dic->di_ctime.t_sec; | |
90 | buf->bs_ctime.tv_nsec = dic->di_ctime.t_nsec; | |
91 | buf->bs_xflags = xfs_ip2xflags(ip); | |
92 | buf->bs_extsize = dic->di_extsize << mp->m_sb.sb_blocklog; | |
93 | buf->bs_extents = dic->di_nextents; | |
94 | buf->bs_gen = dic->di_gen; | |
95 | memset(buf->bs_pad, 0, sizeof(buf->bs_pad)); | |
96 | buf->bs_dmevmask = dic->di_dmevmask; | |
97 | buf->bs_dmstate = dic->di_dmstate; | |
98 | buf->bs_aextents = dic->di_anextents; | |
99 | ||
100 | switch (dic->di_format) { | |
101 | case XFS_DINODE_FMT_DEV: | |
102 | buf->bs_rdev = ip->i_df.if_u2.if_rdev; | |
103 | buf->bs_blksize = BLKDEV_IOSIZE; | |
104 | buf->bs_blocks = 0; | |
105 | break; | |
106 | case XFS_DINODE_FMT_LOCAL: | |
107 | case XFS_DINODE_FMT_UUID: | |
108 | buf->bs_rdev = 0; | |
109 | buf->bs_blksize = mp->m_sb.sb_blocksize; | |
110 | buf->bs_blocks = 0; | |
111 | break; | |
112 | case XFS_DINODE_FMT_EXTENTS: | |
113 | case XFS_DINODE_FMT_BTREE: | |
114 | buf->bs_rdev = 0; | |
115 | buf->bs_blksize = mp->m_sb.sb_blocksize; | |
116 | buf->bs_blocks = dic->di_nblocks + ip->i_delayed_blks; | |
117 | break; | |
118 | } | |
119 | ||
1da177e4 LT |
120 | xfs_iput(ip, XFS_ILOCK_SHARED); |
121 | return error; | |
122 | } | |
123 | ||
7b073390 | 124 | STATIC void |
1da177e4 LT |
125 | xfs_bulkstat_one_dinode( |
126 | xfs_mount_t *mp, /* mount point for filesystem */ | |
127 | xfs_ino_t ino, /* inode number to get data for */ | |
81591fe2 | 128 | xfs_dinode_t *dic, /* dinode inode pointer */ |
1da177e4 LT |
129 | xfs_bstat_t *buf) /* return buffer */ |
130 | { | |
1da177e4 LT |
131 | /* |
132 | * The inode format changed when we moved the link count and | |
133 | * made it 32 bits long. If this is an old format inode, | |
134 | * convert it in memory to look like a new one. If it gets | |
135 | * flushed to disk we will convert back before flushing or | |
136 | * logging it. We zero out the new projid field and the old link | |
137 | * count field. We'll handle clearing the pad field (the remains | |
138 | * of the old uuid field) when we actually convert the inode to | |
139 | * the new format. We don't change the version number so that we | |
140 | * can distinguish this from a real new format inode. | |
141 | */ | |
51ce16d5 | 142 | if (dic->di_version == 1) { |
347d1c01 | 143 | buf->bs_nlink = be16_to_cpu(dic->di_onlink); |
1da177e4 LT |
144 | buf->bs_projid = 0; |
145 | } else { | |
347d1c01 CH |
146 | buf->bs_nlink = be32_to_cpu(dic->di_nlink); |
147 | buf->bs_projid = be16_to_cpu(dic->di_projid); | |
1da177e4 LT |
148 | } |
149 | ||
150 | buf->bs_ino = ino; | |
347d1c01 CH |
151 | buf->bs_mode = be16_to_cpu(dic->di_mode); |
152 | buf->bs_uid = be32_to_cpu(dic->di_uid); | |
153 | buf->bs_gid = be32_to_cpu(dic->di_gid); | |
154 | buf->bs_size = be64_to_cpu(dic->di_size); | |
155 | buf->bs_atime.tv_sec = be32_to_cpu(dic->di_atime.t_sec); | |
156 | buf->bs_atime.tv_nsec = be32_to_cpu(dic->di_atime.t_nsec); | |
157 | buf->bs_mtime.tv_sec = be32_to_cpu(dic->di_mtime.t_sec); | |
158 | buf->bs_mtime.tv_nsec = be32_to_cpu(dic->di_mtime.t_nsec); | |
159 | buf->bs_ctime.tv_sec = be32_to_cpu(dic->di_ctime.t_sec); | |
160 | buf->bs_ctime.tv_nsec = be32_to_cpu(dic->di_ctime.t_nsec); | |
81591fe2 | 161 | buf->bs_xflags = xfs_dic2xflags(dic); |
347d1c01 CH |
162 | buf->bs_extsize = be32_to_cpu(dic->di_extsize) << mp->m_sb.sb_blocklog; |
163 | buf->bs_extents = be32_to_cpu(dic->di_nextents); | |
164 | buf->bs_gen = be32_to_cpu(dic->di_gen); | |
1da177e4 | 165 | memset(buf->bs_pad, 0, sizeof(buf->bs_pad)); |
347d1c01 CH |
166 | buf->bs_dmevmask = be32_to_cpu(dic->di_dmevmask); |
167 | buf->bs_dmstate = be16_to_cpu(dic->di_dmstate); | |
168 | buf->bs_aextents = be16_to_cpu(dic->di_anextents); | |
1da177e4 | 169 | |
347d1c01 | 170 | switch (dic->di_format) { |
1da177e4 | 171 | case XFS_DINODE_FMT_DEV: |
81591fe2 | 172 | buf->bs_rdev = xfs_dinode_get_rdev(dic); |
1da177e4 LT |
173 | buf->bs_blksize = BLKDEV_IOSIZE; |
174 | buf->bs_blocks = 0; | |
175 | break; | |
176 | case XFS_DINODE_FMT_LOCAL: | |
177 | case XFS_DINODE_FMT_UUID: | |
178 | buf->bs_rdev = 0; | |
179 | buf->bs_blksize = mp->m_sb.sb_blocksize; | |
180 | buf->bs_blocks = 0; | |
181 | break; | |
182 | case XFS_DINODE_FMT_EXTENTS: | |
183 | case XFS_DINODE_FMT_BTREE: | |
184 | buf->bs_rdev = 0; | |
185 | buf->bs_blksize = mp->m_sb.sb_blocksize; | |
347d1c01 | 186 | buf->bs_blocks = be64_to_cpu(dic->di_nblocks); |
1da177e4 LT |
187 | break; |
188 | } | |
1da177e4 LT |
189 | } |
190 | ||
65fbaf24 | 191 | /* Return 0 on success or positive error */ |
faa63e95 MM |
192 | STATIC int |
193 | xfs_bulkstat_one_fmt( | |
194 | void __user *ubuffer, | |
65fbaf24 | 195 | int ubsize, |
196 | int *ubused, | |
faa63e95 MM |
197 | const xfs_bstat_t *buffer) |
198 | { | |
65fbaf24 | 199 | if (ubsize < sizeof(*buffer)) |
200 | return XFS_ERROR(ENOMEM); | |
faa63e95 | 201 | if (copy_to_user(ubuffer, buffer, sizeof(*buffer))) |
65fbaf24 | 202 | return XFS_ERROR(EFAULT); |
203 | if (ubused) | |
204 | *ubused = sizeof(*buffer); | |
205 | return 0; | |
faa63e95 MM |
206 | } |
207 | ||
1da177e4 LT |
208 | /* |
209 | * Return stat information for one inode. | |
210 | * Return 0 if ok, else errno. | |
211 | */ | |
2ee4fa5c | 212 | int /* error status */ |
213 | xfs_bulkstat_one_int( | |
1da177e4 LT |
214 | xfs_mount_t *mp, /* mount point for filesystem */ |
215 | xfs_ino_t ino, /* inode number to get data for */ | |
216 | void __user *buffer, /* buffer to place output in */ | |
217 | int ubsize, /* size of buffer */ | |
2ee4fa5c | 218 | bulkstat_one_fmt_pf formatter, /* formatter, copy to user */ |
1da177e4 LT |
219 | xfs_daddr_t bno, /* starting bno of inode cluster */ |
220 | int *ubused, /* bytes used by me */ | |
221 | void *dibuff, /* on-disk inode buffer */ | |
222 | int *stat) /* BULKSTAT_RV_... */ | |
223 | { | |
224 | xfs_bstat_t *buf; /* return buffer */ | |
225 | int error = 0; /* error value */ | |
226 | xfs_dinode_t *dip; /* dinode inode pointer */ | |
227 | ||
228 | dip = (xfs_dinode_t *)dibuff; | |
6f1f2168 | 229 | *stat = BULKSTAT_RV_NOTHING; |
1da177e4 | 230 | |
6f1f2168 | 231 | if (!buffer || xfs_internal_inum(mp, ino)) |
1da177e4 | 232 | return XFS_ERROR(EINVAL); |
1da177e4 LT |
233 | |
234 | buf = kmem_alloc(sizeof(*buf), KM_SLEEP); | |
235 | ||
236 | if (dip == NULL) { | |
237 | /* We're not being passed a pointer to a dinode. This happens | |
238 | * if BULKSTAT_FG_IGET is selected. Do the iget. | |
239 | */ | |
240 | error = xfs_bulkstat_one_iget(mp, ino, bno, buf, stat); | |
241 | if (error) | |
242 | goto out_free; | |
243 | } else { | |
244 | xfs_bulkstat_one_dinode(mp, ino, dip, buf); | |
245 | } | |
246 | ||
65fbaf24 | 247 | error = formatter(buffer, ubsize, ubused, buf); |
248 | if (error) | |
1da177e4 | 249 | goto out_free; |
1da177e4 LT |
250 | |
251 | *stat = BULKSTAT_RV_DIDONE; | |
1da177e4 LT |
252 | |
253 | out_free: | |
f0e2d93c | 254 | kmem_free(buf); |
1da177e4 LT |
255 | return error; |
256 | } | |
257 | ||
2ee4fa5c | 258 | int |
259 | xfs_bulkstat_one( | |
260 | xfs_mount_t *mp, /* mount point for filesystem */ | |
261 | xfs_ino_t ino, /* inode number to get data for */ | |
262 | void __user *buffer, /* buffer to place output in */ | |
263 | int ubsize, /* size of buffer */ | |
264 | void *private_data, /* my private data */ | |
265 | xfs_daddr_t bno, /* starting bno of inode cluster */ | |
266 | int *ubused, /* bytes used by me */ | |
267 | void *dibuff, /* on-disk inode buffer */ | |
268 | int *stat) /* BULKSTAT_RV_... */ | |
269 | { | |
270 | return xfs_bulkstat_one_int(mp, ino, buffer, ubsize, | |
271 | xfs_bulkstat_one_fmt, bno, | |
272 | ubused, dibuff, stat); | |
273 | } | |
274 | ||
8b56f083 NS |
275 | /* |
276 | * Test to see whether we can use the ondisk inode directly, based | |
277 | * on the given bulkstat flags, filling in dipp accordingly. | |
278 | * Returns zero if the inode is dodgey. | |
279 | */ | |
280 | STATIC int | |
281 | xfs_bulkstat_use_dinode( | |
282 | xfs_mount_t *mp, | |
283 | int flags, | |
284 | xfs_buf_t *bp, | |
285 | int clustidx, | |
286 | xfs_dinode_t **dipp) | |
287 | { | |
288 | xfs_dinode_t *dip; | |
289 | unsigned int aformat; | |
290 | ||
291 | *dipp = NULL; | |
292 | if (!bp || (flags & BULKSTAT_FG_IGET)) | |
293 | return 1; | |
294 | dip = (xfs_dinode_t *) | |
295 | xfs_buf_offset(bp, clustidx << mp->m_sb.sb_inodelog); | |
859d7182 | 296 | /* |
c319b58b | 297 | * Check the buffer containing the on-disk inode for di_mode == 0. |
859d7182 VA |
298 | * This is to prevent xfs_bulkstat from picking up just reclaimed |
299 | * inodes that have their in-core state initialized but not flushed | |
300 | * to disk yet. This is a temporary hack that would require a proper | |
301 | * fix in the future. | |
302 | */ | |
81591fe2 CH |
303 | if (be16_to_cpu(dip->di_magic) != XFS_DINODE_MAGIC || |
304 | !XFS_DINODE_GOOD_VERSION(dip->di_version) || | |
305 | !dip->di_mode) | |
8b56f083 NS |
306 | return 0; |
307 | if (flags & BULKSTAT_FG_QUICK) { | |
308 | *dipp = dip; | |
309 | return 1; | |
310 | } | |
311 | /* BULKSTAT_FG_INLINE: if attr fork is local, or not there, use it */ | |
81591fe2 | 312 | aformat = dip->di_aformat; |
45ba598e | 313 | if ((XFS_DFORK_Q(dip) == 0) || |
8b56f083 | 314 | (aformat == XFS_DINODE_FMT_LOCAL) || |
81591fe2 | 315 | (aformat == XFS_DINODE_FMT_EXTENTS && !dip->di_anextents)) { |
8b56f083 NS |
316 | *dipp = dip; |
317 | return 1; | |
318 | } | |
319 | return 1; | |
320 | } | |
321 | ||
cd57e594 LM |
322 | #define XFS_BULKSTAT_UBLEFT(ubleft) ((ubleft) >= statstruct_size) |
323 | ||
1da177e4 LT |
324 | /* |
325 | * Return stat information in bulk (by-inode) for the filesystem. | |
326 | */ | |
327 | int /* error status */ | |
328 | xfs_bulkstat( | |
329 | xfs_mount_t *mp, /* mount point for filesystem */ | |
330 | xfs_ino_t *lastinop, /* last inode returned */ | |
331 | int *ubcountp, /* size of buffer/count returned */ | |
332 | bulkstat_one_pf formatter, /* func that'd fill a single buf */ | |
333 | void *private_data,/* private data for formatter */ | |
334 | size_t statstruct_size, /* sizeof struct filling */ | |
335 | char __user *ubuffer, /* buffer with inode stats */ | |
336 | int flags, /* defined in xfs_itable.h */ | |
c41564b5 | 337 | int *done) /* 1 if there are more stats to get */ |
1da177e4 LT |
338 | { |
339 | xfs_agblock_t agbno=0;/* allocation group block number */ | |
340 | xfs_buf_t *agbp; /* agi header buffer */ | |
341 | xfs_agi_t *agi; /* agi header data */ | |
342 | xfs_agino_t agino; /* inode # in allocation group */ | |
343 | xfs_agnumber_t agno; /* allocation group number */ | |
344 | xfs_daddr_t bno; /* inode cluster start daddr */ | |
345 | int chunkidx; /* current index into inode chunk */ | |
346 | int clustidx; /* current index into inode cluster */ | |
347 | xfs_btree_cur_t *cur; /* btree cursor for ialloc btree */ | |
348 | int end_of_ag; /* set if we've seen the ag end */ | |
349 | int error; /* error code */ | |
350 | int fmterror;/* bulkstat formatter result */ | |
351 | __int32_t gcnt; /* current btree rec's count */ | |
352 | xfs_inofree_t gfree; /* current btree rec's free mask */ | |
353 | xfs_agino_t gino; /* current btree rec's start inode */ | |
354 | int i; /* loop index */ | |
355 | int icount; /* count of inodes good in irbuf */ | |
215101c3 | 356 | size_t irbsize; /* size of irec buffer in bytes */ |
1da177e4 | 357 | xfs_ino_t ino; /* inode number (filesystem) */ |
26275093 NS |
358 | xfs_inobt_rec_incore_t *irbp; /* current irec buffer pointer */ |
359 | xfs_inobt_rec_incore_t *irbuf; /* start of irec buffer */ | |
360 | xfs_inobt_rec_incore_t *irbufend; /* end of good irec buffer entries */ | |
cd57e594 | 361 | xfs_ino_t lastino; /* last inode number returned */ |
1da177e4 LT |
362 | int nbcluster; /* # of blocks in a cluster */ |
363 | int nicluster; /* # of inodes in a cluster */ | |
364 | int nimask; /* mask for inode clusters */ | |
365 | int nirbuf; /* size of irbuf */ | |
366 | int rval; /* return value error code */ | |
367 | int tmp; /* result value from btree calls */ | |
368 | int ubcount; /* size of user's buffer */ | |
369 | int ubleft; /* bytes left in user's buffer */ | |
370 | char __user *ubufp; /* pointer into user's buffer */ | |
371 | int ubelem; /* spaces used in user's buffer */ | |
372 | int ubused; /* bytes used by formatter */ | |
373 | xfs_buf_t *bp; /* ptr to on-disk inode cluster buf */ | |
374 | xfs_dinode_t *dip; /* ptr into bp for specific inode */ | |
1da177e4 LT |
375 | |
376 | /* | |
377 | * Get the last inode value, see if there's nothing to do. | |
378 | */ | |
379 | ino = (xfs_ino_t)*lastinop; | |
cd57e594 | 380 | lastino = ino; |
1da177e4 LT |
381 | dip = NULL; |
382 | agno = XFS_INO_TO_AGNO(mp, ino); | |
383 | agino = XFS_INO_TO_AGINO(mp, ino); | |
384 | if (agno >= mp->m_sb.sb_agcount || | |
385 | ino != XFS_AGINO_TO_INO(mp, agno, agino)) { | |
386 | *done = 1; | |
387 | *ubcountp = 0; | |
388 | return 0; | |
389 | } | |
cd57e594 LM |
390 | if (!ubcountp || *ubcountp <= 0) { |
391 | return EINVAL; | |
392 | } | |
1da177e4 LT |
393 | ubcount = *ubcountp; /* statstruct's */ |
394 | ubleft = ubcount * statstruct_size; /* bytes */ | |
395 | *ubcountp = ubelem = 0; | |
396 | *done = 0; | |
397 | fmterror = 0; | |
398 | ubufp = ubuffer; | |
399 | nicluster = mp->m_sb.sb_blocksize >= XFS_INODE_CLUSTER_SIZE(mp) ? | |
400 | mp->m_sb.sb_inopblock : | |
401 | (XFS_INODE_CLUSTER_SIZE(mp) >> mp->m_sb.sb_inodelog); | |
402 | nimask = ~(nicluster - 1); | |
403 | nbcluster = nicluster >> mp->m_sb.sb_inopblog; | |
e6a4b37f | 404 | irbuf = kmem_zalloc_greedy(&irbsize, PAGE_SIZE, PAGE_SIZE * 4, |
77e4635a | 405 | KM_SLEEP | KM_MAYFAIL | KM_LARGE); |
bb3c7d29 NS |
406 | nirbuf = irbsize / sizeof(*irbuf); |
407 | ||
1da177e4 LT |
408 | /* |
409 | * Loop over the allocation groups, starting from the last | |
410 | * inode returned; 0 means start of the allocation group. | |
411 | */ | |
412 | rval = 0; | |
cd57e594 LM |
413 | while (XFS_BULKSTAT_UBLEFT(ubleft) && agno < mp->m_sb.sb_agcount) { |
414 | cond_resched(); | |
1da177e4 LT |
415 | bp = NULL; |
416 | down_read(&mp->m_peraglock); | |
417 | error = xfs_ialloc_read_agi(mp, NULL, agno, &agbp); | |
418 | up_read(&mp->m_peraglock); | |
419 | if (error) { | |
420 | /* | |
421 | * Skip this allocation group and go to the next one. | |
422 | */ | |
423 | agno++; | |
424 | agino = 0; | |
425 | continue; | |
426 | } | |
427 | agi = XFS_BUF_TO_AGI(agbp); | |
428 | /* | |
429 | * Allocate and initialize a btree cursor for ialloc btree. | |
430 | */ | |
561f7d17 | 431 | cur = xfs_inobt_init_cursor(mp, NULL, agbp, agno); |
1da177e4 LT |
432 | irbp = irbuf; |
433 | irbufend = irbuf + nirbuf; | |
434 | end_of_ag = 0; | |
435 | /* | |
436 | * If we're returning in the middle of an allocation group, | |
437 | * we need to get the remainder of the chunk we're in. | |
438 | */ | |
439 | if (agino > 0) { | |
440 | /* | |
441 | * Lookup the inode chunk that this inode lives in. | |
442 | */ | |
443 | error = xfs_inobt_lookup_le(cur, agino, 0, 0, &tmp); | |
444 | if (!error && /* no I/O error */ | |
445 | tmp && /* lookup succeeded */ | |
446 | /* got the record, should always work */ | |
447 | !(error = xfs_inobt_get_rec(cur, &gino, &gcnt, | |
448 | &gfree, &i)) && | |
449 | i == 1 && | |
450 | /* this is the right chunk */ | |
451 | agino < gino + XFS_INODES_PER_CHUNK && | |
452 | /* lastino was not last in chunk */ | |
453 | (chunkidx = agino - gino + 1) < | |
454 | XFS_INODES_PER_CHUNK && | |
455 | /* there are some left allocated */ | |
9d87c319 | 456 | xfs_inobt_maskn(chunkidx, |
1da177e4 LT |
457 | XFS_INODES_PER_CHUNK - chunkidx) & ~gfree) { |
458 | /* | |
459 | * Grab the chunk record. Mark all the | |
460 | * uninteresting inodes (because they're | |
461 | * before our start point) free. | |
462 | */ | |
463 | for (i = 0; i < chunkidx; i++) { | |
464 | if (XFS_INOBT_MASK(i) & ~gfree) | |
465 | gcnt++; | |
466 | } | |
9d87c319 | 467 | gfree |= xfs_inobt_maskn(0, chunkidx); |
26275093 NS |
468 | irbp->ir_startino = gino; |
469 | irbp->ir_freecount = gcnt; | |
470 | irbp->ir_free = gfree; | |
1da177e4 LT |
471 | irbp++; |
472 | agino = gino + XFS_INODES_PER_CHUNK; | |
473 | icount = XFS_INODES_PER_CHUNK - gcnt; | |
474 | } else { | |
475 | /* | |
476 | * If any of those tests failed, bump the | |
477 | * inode number (just in case). | |
478 | */ | |
479 | agino++; | |
480 | icount = 0; | |
481 | } | |
482 | /* | |
483 | * In any case, increment to the next record. | |
484 | */ | |
485 | if (!error) | |
637aa50f | 486 | error = xfs_btree_increment(cur, 0, &tmp); |
1da177e4 LT |
487 | } else { |
488 | /* | |
489 | * Start of ag. Lookup the first inode chunk. | |
490 | */ | |
491 | error = xfs_inobt_lookup_ge(cur, 0, 0, 0, &tmp); | |
492 | icount = 0; | |
493 | } | |
494 | /* | |
495 | * Loop through inode btree records in this ag, | |
496 | * until we run out of inodes or space in the buffer. | |
497 | */ | |
498 | while (irbp < irbufend && icount < ubcount) { | |
499 | /* | |
500 | * Loop as long as we're unable to read the | |
501 | * inode btree. | |
502 | */ | |
503 | while (error) { | |
504 | agino += XFS_INODES_PER_CHUNK; | |
505 | if (XFS_AGINO_TO_AGBNO(mp, agino) >= | |
16259e7d | 506 | be32_to_cpu(agi->agi_length)) |
1da177e4 LT |
507 | break; |
508 | error = xfs_inobt_lookup_ge(cur, agino, 0, 0, | |
509 | &tmp); | |
cd57e594 | 510 | cond_resched(); |
1da177e4 LT |
511 | } |
512 | /* | |
513 | * If ran off the end of the ag either with an error, | |
514 | * or the normal way, set end and stop collecting. | |
515 | */ | |
516 | if (error || | |
517 | (error = xfs_inobt_get_rec(cur, &gino, &gcnt, | |
518 | &gfree, &i)) || | |
519 | i == 0) { | |
520 | end_of_ag = 1; | |
521 | break; | |
522 | } | |
523 | /* | |
524 | * If this chunk has any allocated inodes, save it. | |
26275093 | 525 | * Also start read-ahead now for this chunk. |
1da177e4 LT |
526 | */ |
527 | if (gcnt < XFS_INODES_PER_CHUNK) { | |
26275093 NS |
528 | /* |
529 | * Loop over all clusters in the next chunk. | |
530 | * Do a readahead if there are any allocated | |
531 | * inodes in that cluster. | |
532 | */ | |
533 | for (agbno = XFS_AGINO_TO_AGBNO(mp, gino), | |
534 | chunkidx = 0; | |
535 | chunkidx < XFS_INODES_PER_CHUNK; | |
536 | chunkidx += nicluster, | |
537 | agbno += nbcluster) { | |
9d87c319 | 538 | if (xfs_inobt_maskn(chunkidx, |
26275093 NS |
539 | nicluster) & ~gfree) |
540 | xfs_btree_reada_bufs(mp, agno, | |
541 | agbno, nbcluster); | |
542 | } | |
543 | irbp->ir_startino = gino; | |
544 | irbp->ir_freecount = gcnt; | |
545 | irbp->ir_free = gfree; | |
1da177e4 LT |
546 | irbp++; |
547 | icount += XFS_INODES_PER_CHUNK - gcnt; | |
548 | } | |
549 | /* | |
550 | * Set agino to after this chunk and bump the cursor. | |
551 | */ | |
552 | agino = gino + XFS_INODES_PER_CHUNK; | |
637aa50f | 553 | error = xfs_btree_increment(cur, 0, &tmp); |
cd57e594 | 554 | cond_resched(); |
1da177e4 LT |
555 | } |
556 | /* | |
557 | * Drop the btree buffers and the agi buffer. | |
558 | * We can't hold any of the locks these represent | |
559 | * when calling iget. | |
560 | */ | |
561 | xfs_btree_del_cursor(cur, XFS_BTREE_NOERROR); | |
562 | xfs_buf_relse(agbp); | |
563 | /* | |
564 | * Now format all the good inodes into the user's buffer. | |
565 | */ | |
566 | irbufend = irbp; | |
567 | for (irbp = irbuf; | |
cd57e594 | 568 | irbp < irbufend && XFS_BULKSTAT_UBLEFT(ubleft); irbp++) { |
1da177e4 LT |
569 | /* |
570 | * Now process this chunk of inodes. | |
571 | */ | |
26275093 | 572 | for (agino = irbp->ir_startino, chunkidx = clustidx = 0; |
cd57e594 | 573 | XFS_BULKSTAT_UBLEFT(ubleft) && |
26275093 | 574 | irbp->ir_freecount < XFS_INODES_PER_CHUNK; |
1da177e4 LT |
575 | chunkidx++, clustidx++, agino++) { |
576 | ASSERT(chunkidx < XFS_INODES_PER_CHUNK); | |
577 | /* | |
578 | * Recompute agbno if this is the | |
579 | * first inode of the cluster. | |
580 | * | |
581 | * Careful with clustidx. There can be | |
582 | * multple clusters per chunk, a single | |
583 | * cluster per chunk or a cluster that has | |
584 | * inodes represented from several different | |
585 | * chunks (if blocksize is large). | |
586 | * | |
587 | * Because of this, the starting clustidx is | |
588 | * initialized to zero in this loop but must | |
589 | * later be reset after reading in the cluster | |
590 | * buffer. | |
591 | */ | |
592 | if ((chunkidx & (nicluster - 1)) == 0) { | |
593 | agbno = XFS_AGINO_TO_AGBNO(mp, | |
26275093 | 594 | irbp->ir_startino) + |
1da177e4 LT |
595 | ((chunkidx & nimask) >> |
596 | mp->m_sb.sb_inopblog); | |
597 | ||
8b56f083 NS |
598 | if (flags & (BULKSTAT_FG_QUICK | |
599 | BULKSTAT_FG_INLINE)) { | |
c679eef0 CH |
600 | int offset; |
601 | ||
1da177e4 LT |
602 | ino = XFS_AGINO_TO_INO(mp, agno, |
603 | agino); | |
604 | bno = XFS_AGB_TO_DADDR(mp, agno, | |
605 | agbno); | |
606 | ||
607 | /* | |
608 | * Get the inode cluster buffer | |
609 | */ | |
1da177e4 LT |
610 | if (bp) |
611 | xfs_buf_relse(bp); | |
c679eef0 CH |
612 | |
613 | error = xfs_inotobp(mp, NULL, ino, &dip, | |
614 | &bp, &offset, | |
b48d8d64 | 615 | XFS_IGET_BULKSTAT); |
c679eef0 | 616 | |
1da177e4 | 617 | if (!error) |
c679eef0 | 618 | clustidx = offset / mp->m_sb.sb_inodesize; |
1da177e4 LT |
619 | if (XFS_TEST_ERROR(error != 0, |
620 | mp, XFS_ERRTAG_BULKSTAT_READ_CHUNK, | |
621 | XFS_RANDOM_BULKSTAT_READ_CHUNK)) { | |
622 | bp = NULL; | |
b12dd342 NS |
623 | ubleft = 0; |
624 | rval = error; | |
1da177e4 LT |
625 | break; |
626 | } | |
627 | } | |
628 | } | |
c2cba57e LM |
629 | ino = XFS_AGINO_TO_INO(mp, agno, agino); |
630 | bno = XFS_AGB_TO_DADDR(mp, agno, agbno); | |
1da177e4 LT |
631 | /* |
632 | * Skip if this inode is free. | |
633 | */ | |
c2cba57e LM |
634 | if (XFS_INOBT_MASK(chunkidx) & irbp->ir_free) { |
635 | lastino = ino; | |
1da177e4 | 636 | continue; |
c2cba57e | 637 | } |
1da177e4 LT |
638 | /* |
639 | * Count used inodes as free so we can tell | |
640 | * when the chunk is used up. | |
641 | */ | |
26275093 | 642 | irbp->ir_freecount++; |
8b56f083 | 643 | if (!xfs_bulkstat_use_dinode(mp, flags, bp, |
c2cba57e LM |
644 | clustidx, &dip)) { |
645 | lastino = ino; | |
8b56f083 | 646 | continue; |
c2cba57e | 647 | } |
8b56f083 NS |
648 | /* |
649 | * If we need to do an iget, cannot hold bp. | |
650 | * Drop it, until starting the next cluster. | |
651 | */ | |
652 | if ((flags & BULKSTAT_FG_INLINE) && !dip) { | |
653 | if (bp) | |
654 | xfs_buf_relse(bp); | |
655 | bp = NULL; | |
1da177e4 LT |
656 | } |
657 | ||
658 | /* | |
659 | * Get the inode and fill in a single buffer. | |
660 | * BULKSTAT_FG_QUICK uses dip to fill it in. | |
661 | * BULKSTAT_FG_IGET uses igets. | |
8b56f083 NS |
662 | * BULKSTAT_FG_INLINE uses dip if we have an |
663 | * inline attr fork, else igets. | |
1da177e4 LT |
664 | * See: xfs_bulkstat_one & xfs_dm_bulkstat_one. |
665 | * This is also used to count inodes/blks, etc | |
666 | * in xfs_qm_quotacheck. | |
667 | */ | |
668 | ubused = statstruct_size; | |
669 | error = formatter(mp, ino, ubufp, | |
670 | ubleft, private_data, | |
671 | bno, &ubused, dip, &fmterror); | |
672 | if (fmterror == BULKSTAT_RV_NOTHING) { | |
cd57e594 LM |
673 | if (error && error != ENOENT && |
674 | error != EINVAL) { | |
e132f54c | 675 | ubleft = 0; |
cd57e594 LM |
676 | rval = error; |
677 | break; | |
678 | } | |
679 | lastino = ino; | |
1da177e4 LT |
680 | continue; |
681 | } | |
682 | if (fmterror == BULKSTAT_RV_GIVEUP) { | |
683 | ubleft = 0; | |
684 | ASSERT(error); | |
685 | rval = error; | |
686 | break; | |
687 | } | |
688 | if (ubufp) | |
689 | ubufp += ubused; | |
690 | ubleft -= ubused; | |
691 | ubelem++; | |
692 | lastino = ino; | |
693 | } | |
cd57e594 LM |
694 | |
695 | cond_resched(); | |
1da177e4 LT |
696 | } |
697 | ||
698 | if (bp) | |
699 | xfs_buf_relse(bp); | |
700 | ||
701 | /* | |
702 | * Set up for the next loop iteration. | |
703 | */ | |
cd57e594 | 704 | if (XFS_BULKSTAT_UBLEFT(ubleft)) { |
1da177e4 LT |
705 | if (end_of_ag) { |
706 | agno++; | |
707 | agino = 0; | |
cd57e594 LM |
708 | } else |
709 | agino = XFS_INO_TO_AGINO(mp, lastino); | |
1da177e4 LT |
710 | } else |
711 | break; | |
712 | } | |
713 | /* | |
714 | * Done, we're either out of filesystem or space to put the data. | |
715 | */ | |
f0e2d93c | 716 | kmem_free(irbuf); |
1da177e4 | 717 | *ubcountp = ubelem; |
cd57e594 LM |
718 | /* |
719 | * Found some inodes, return them now and return the error next time. | |
720 | */ | |
721 | if (ubelem) | |
722 | rval = 0; | |
1da177e4 LT |
723 | if (agno >= mp->m_sb.sb_agcount) { |
724 | /* | |
725 | * If we ran out of filesystem, mark lastino as off | |
726 | * the end of the filesystem, so the next call | |
727 | * will return immediately. | |
728 | */ | |
729 | *lastinop = (xfs_ino_t)XFS_AGINO_TO_INO(mp, agno, 0); | |
730 | *done = 1; | |
731 | } else | |
732 | *lastinop = (xfs_ino_t)lastino; | |
733 | ||
734 | return rval; | |
735 | } | |
736 | ||
737 | /* | |
738 | * Return stat information in bulk (by-inode) for the filesystem. | |
739 | * Special case for non-sequential one inode bulkstat. | |
740 | */ | |
741 | int /* error status */ | |
742 | xfs_bulkstat_single( | |
743 | xfs_mount_t *mp, /* mount point for filesystem */ | |
744 | xfs_ino_t *lastinop, /* inode to return */ | |
745 | char __user *buffer, /* buffer with inode stats */ | |
c41564b5 | 746 | int *done) /* 1 if there are more stats to get */ |
1da177e4 LT |
747 | { |
748 | int count; /* count value for bulkstat call */ | |
749 | int error; /* return value */ | |
750 | xfs_ino_t ino; /* filesystem inode number */ | |
751 | int res; /* result from bs1 */ | |
752 | ||
753 | /* | |
754 | * note that requesting valid inode numbers which are not allocated | |
755 | * to inodes will most likely cause xfs_itobp to generate warning | |
756 | * messages about bad magic numbers. This is ok. The fact that | |
757 | * the inode isn't actually an inode is handled by the | |
758 | * error check below. Done this way to make the usual case faster | |
759 | * at the expense of the error case. | |
760 | */ | |
761 | ||
762 | ino = (xfs_ino_t)*lastinop; | |
763 | error = xfs_bulkstat_one(mp, ino, buffer, sizeof(xfs_bstat_t), | |
764 | NULL, 0, NULL, NULL, &res); | |
765 | if (error) { | |
766 | /* | |
767 | * Special case way failed, do it the "long" way | |
768 | * to see if that works. | |
769 | */ | |
770 | (*lastinop)--; | |
771 | count = 1; | |
772 | if (xfs_bulkstat(mp, lastinop, &count, xfs_bulkstat_one, | |
773 | NULL, sizeof(xfs_bstat_t), buffer, | |
774 | BULKSTAT_FG_IGET, done)) | |
775 | return error; | |
776 | if (count == 0 || (xfs_ino_t)*lastinop != ino) | |
777 | return error == EFSCORRUPTED ? | |
778 | XFS_ERROR(EINVAL) : error; | |
779 | else | |
780 | return 0; | |
781 | } | |
782 | *done = 0; | |
783 | return 0; | |
784 | } | |
785 | ||
faa63e95 MM |
786 | int |
787 | xfs_inumbers_fmt( | |
788 | void __user *ubuffer, /* buffer to write to */ | |
789 | const xfs_inogrp_t *buffer, /* buffer to read from */ | |
790 | long count, /* # of elements to read */ | |
791 | long *written) /* # of bytes written */ | |
792 | { | |
793 | if (copy_to_user(ubuffer, buffer, count * sizeof(*buffer))) | |
794 | return -EFAULT; | |
795 | *written = count * sizeof(*buffer); | |
796 | return 0; | |
797 | } | |
798 | ||
1da177e4 LT |
799 | /* |
800 | * Return inode number table for the filesystem. | |
801 | */ | |
802 | int /* error status */ | |
803 | xfs_inumbers( | |
804 | xfs_mount_t *mp, /* mount point for filesystem */ | |
805 | xfs_ino_t *lastino, /* last inode returned */ | |
806 | int *count, /* size of buffer/count returned */ | |
faa63e95 MM |
807 | void __user *ubuffer,/* buffer with inode descriptions */ |
808 | inumbers_fmt_pf formatter) | |
1da177e4 LT |
809 | { |
810 | xfs_buf_t *agbp; | |
811 | xfs_agino_t agino; | |
812 | xfs_agnumber_t agno; | |
813 | int bcount; | |
814 | xfs_inogrp_t *buffer; | |
815 | int bufidx; | |
816 | xfs_btree_cur_t *cur; | |
817 | int error; | |
818 | __int32_t gcnt; | |
819 | xfs_inofree_t gfree; | |
820 | xfs_agino_t gino; | |
821 | int i; | |
822 | xfs_ino_t ino; | |
823 | int left; | |
824 | int tmp; | |
825 | ||
826 | ino = (xfs_ino_t)*lastino; | |
827 | agno = XFS_INO_TO_AGNO(mp, ino); | |
828 | agino = XFS_INO_TO_AGINO(mp, ino); | |
829 | left = *count; | |
830 | *count = 0; | |
e6a4b37f | 831 | bcount = MIN(left, (int)(PAGE_SIZE / sizeof(*buffer))); |
1da177e4 LT |
832 | buffer = kmem_alloc(bcount * sizeof(*buffer), KM_SLEEP); |
833 | error = bufidx = 0; | |
834 | cur = NULL; | |
835 | agbp = NULL; | |
836 | while (left > 0 && agno < mp->m_sb.sb_agcount) { | |
837 | if (agbp == NULL) { | |
838 | down_read(&mp->m_peraglock); | |
839 | error = xfs_ialloc_read_agi(mp, NULL, agno, &agbp); | |
840 | up_read(&mp->m_peraglock); | |
841 | if (error) { | |
842 | /* | |
843 | * If we can't read the AGI of this ag, | |
844 | * then just skip to the next one. | |
845 | */ | |
846 | ASSERT(cur == NULL); | |
847 | agbp = NULL; | |
848 | agno++; | |
849 | agino = 0; | |
850 | continue; | |
851 | } | |
561f7d17 | 852 | cur = xfs_inobt_init_cursor(mp, NULL, agbp, agno); |
1da177e4 LT |
853 | error = xfs_inobt_lookup_ge(cur, agino, 0, 0, &tmp); |
854 | if (error) { | |
855 | xfs_btree_del_cursor(cur, XFS_BTREE_ERROR); | |
856 | cur = NULL; | |
857 | xfs_buf_relse(agbp); | |
858 | agbp = NULL; | |
859 | /* | |
59c51591 | 860 | * Move up the last inode in the current |
1da177e4 LT |
861 | * chunk. The lookup_ge will always get |
862 | * us the first inode in the next chunk. | |
863 | */ | |
864 | agino += XFS_INODES_PER_CHUNK - 1; | |
865 | continue; | |
866 | } | |
867 | } | |
868 | if ((error = xfs_inobt_get_rec(cur, &gino, &gcnt, &gfree, | |
869 | &i)) || | |
870 | i == 0) { | |
871 | xfs_buf_relse(agbp); | |
872 | agbp = NULL; | |
873 | xfs_btree_del_cursor(cur, XFS_BTREE_NOERROR); | |
874 | cur = NULL; | |
875 | agno++; | |
876 | agino = 0; | |
877 | continue; | |
878 | } | |
879 | agino = gino + XFS_INODES_PER_CHUNK - 1; | |
880 | buffer[bufidx].xi_startino = XFS_AGINO_TO_INO(mp, agno, gino); | |
881 | buffer[bufidx].xi_alloccount = XFS_INODES_PER_CHUNK - gcnt; | |
882 | buffer[bufidx].xi_allocmask = ~gfree; | |
883 | bufidx++; | |
884 | left--; | |
885 | if (bufidx == bcount) { | |
faa63e95 MM |
886 | long written; |
887 | if (formatter(ubuffer, buffer, bufidx, &written)) { | |
1da177e4 LT |
888 | error = XFS_ERROR(EFAULT); |
889 | break; | |
890 | } | |
faa63e95 | 891 | ubuffer += written; |
1da177e4 LT |
892 | *count += bufidx; |
893 | bufidx = 0; | |
894 | } | |
895 | if (left) { | |
637aa50f | 896 | error = xfs_btree_increment(cur, 0, &tmp); |
1da177e4 LT |
897 | if (error) { |
898 | xfs_btree_del_cursor(cur, XFS_BTREE_ERROR); | |
899 | cur = NULL; | |
900 | xfs_buf_relse(agbp); | |
901 | agbp = NULL; | |
902 | /* | |
903 | * The agino value has already been bumped. | |
904 | * Just try to skip up to it. | |
905 | */ | |
906 | agino += XFS_INODES_PER_CHUNK; | |
907 | continue; | |
908 | } | |
909 | } | |
910 | } | |
911 | if (!error) { | |
912 | if (bufidx) { | |
faa63e95 MM |
913 | long written; |
914 | if (formatter(ubuffer, buffer, bufidx, &written)) | |
1da177e4 LT |
915 | error = XFS_ERROR(EFAULT); |
916 | else | |
917 | *count += bufidx; | |
918 | } | |
919 | *lastino = XFS_AGINO_TO_INO(mp, agno, agino); | |
920 | } | |
f0e2d93c | 921 | kmem_free(buffer); |
1da177e4 LT |
922 | if (cur) |
923 | xfs_btree_del_cursor(cur, (error ? XFS_BTREE_ERROR : | |
924 | XFS_BTREE_NOERROR)); | |
925 | if (agbp) | |
926 | xfs_buf_relse(agbp); | |
927 | return error; | |
928 | } |